The Parker 6-4H6MK4S is a genuine Parker Triple-Lok 37° flare male connector, engineered for reliable high-pressure hydraulic applications. This durable steel fitting connects a 3/8 inch (9.525 mm) outside diameter tube to a 1/4 inch NPTF female port. It features a robust steel construction, typically zinc dichromate or zinc nickel plated for enhanced corrosion resistance, and is rated for a maximum operating pressure of 344.7 bar (5000 psi). The fitting has an overall length of approximately 39.6 mm and a hex size of 14.29 mm for secure installation.